What does the term “refrain” refer to in a song or poem?
a.
a line that is repeated in multiple stanzas
b.
the use of auditory imagery
c.
the prohibition of rhyme in a stanza or verse
d.
a ballad that tells a sorrowful tale

A. a line that is repeated in multiple stanzas

Explanation:

A "refrain" in a song or peom is a line that is repeated at a regular interval in multiple stanzas. In a song, it is usually called the chorus. Refrain is taken from an old Latin word (refringere) and later a French word (refraindre)  that means "to repeat."

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